The current through a $10 V$ tungsten filament lamp connected to a $10 V$ source of negligible resistance is $2 A$ . Calculate the electrical energy (in kWh) consumed in $5 h o u r s$ .

100 kWh

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0.1 kWh

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20 kWh

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0.2 kWh

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Solution

The correct option is B
0.1 kWh

Given, $V = 10 V, I = 2 A, t = 5 h o u r s$

We know electrical energy $= V I t$

$∴$ Energy consumed $= 10 \times 2 \times 5 = 100 W h = 0.1 k W h$

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The current through a 10 V tungsten filament lamp connected to a 10 V source of negligible resistance is 2 A. Calculate the electrical energy (in kWh) consumed in 5 hours.

The correct option is B 0.1 kWh Given, V = 10 V, I = 2 A, t = 5 hours We know electrical energy =VIt ∴ Energy consumed =10×2×5 = 100 Wh = 0.1 kWh

The current through a $10 V$ tungsten filament lamp connected to a $10 V$ source of negligible resistance is $2 A$ . Calculate the electrical energy (in kWh) consumed in $5 h o u r s$ .

The correct option is B
0.1 kWh

Given, $V = 10 V, I = 2 A, t = 5 h o u r s$

We know electrical energy $= V I t$

$∴$ Energy consumed $= 10 \times 2 \times 5 = 100 W h = 0.1 k W h$